At my time of reading it is not at all clear to me how the "sandbox network proxy" knows what value to inject in place of the string "proxy-managed"

> Prerequisites > An Anthropic API key in an env variable

I am willing to accept that the steps in the tutorial may work... but if it does work it seems like there has to be some implicit knowledge about common Anthropic API key env var names or something like this

I wanna say for something which is 100% a security product I prefer explicit versus implicit / magically